Purpose or Problem
The purpose is to determine if the Sun's highest altitude in the sky during the day is at the time exactly halfway between sunrise and sunset.
Overview
The Sun illuminates half of the Earth all the time. But the length of daylight is not half of a day (12 hours) every day. In fact, the length of daylight changes daily and varies at different locations on the Earth.
From about December 22nd to June 21st, the length of daylight increases daily in the Northern Hemisphere, and it decreases from June 21st to December 22nd. This is because the Earth does not spin on its axis in the same plane as it orbits the Sun. The Earth is tilted toward the orbiting plane at a 23½ degree angle.
This tilt not only accounts for why the length of daylight varies, it also gives us a changing of seasons from spring, summer, fall, and winter.
The Sun rises in the east and sets in the west, but the path it travels across the sky changes as the seasons change. The altitude (its height above the horizon) of the Sun reaches a higher angle during the day in the summer than in the winter.
Does the Sun reach its highest point in the sky (its zenith) during the day at the time that is halfway between sunrise and sunset for that day?
Knowing the position of the Sun at all times during the day throughout the year at a particular location is important to architects who design buildings. They need to know how much sunlight will enter through windows because this will affect their designs for lighting, heating, and air conditioning.
Purpose or Problem
The purpose is to determine if the Sun's highest altitude in the sky during the day is at the time exactly halfway between sunrise and sunset.
Overview
The Sun illuminates half of the Earth all the time. But the length of daylight is not half of a day (12 hours) every day. In fact, the length of daylight changes daily and varies at different locations on the Earth.
From about December 22nd to June 21st, the length of daylight increases daily in the Northern Hemisphere, and it decreases from June 21st to December 22nd. This is because the Earth does not spin on its axis in the same plane as it orbits the Sun. The Earth is tilted toward the orbiting plane at a 23½ degree angle.
This tilt not only accounts for why the length of daylight varies, it also gives us a changing of seasons from spring, summer, fall, and winter.
The Sun rises in the east and sets in the west, but the path it travels across the sky changes as the seasons change. The altitude (its height above the horizon) of the Sun reaches a higher angle during the day in the summer than in the winter.
Does the Sun reach its highest point in the sky (its zenith) during the day at the time that is halfway between sunrise and sunset for that day?
Knowing the position of the Sun at all times during the day throughout the year at a particular location is important to architects who design buildings. They need to know how much sunlight will enter through windows because this will affect their designs for lighting, heating, and air conditioning.
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